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Old 11-24-2012, 05:27 PM   #1
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Simple Solar Hot Water Box (for domestic hot water)


http://rimstar.org/renewnrg/diy_pex_...thermal_dn.htm

The total cost to build and install myself was about $400 total. I got my money back on it in approx. 1.6 years . In the link, it shows pictures of the construction of the box / a piping diagram / and test results. Its been in operation for about 2 years now and it puts out some good quality hot water that i have to mix in some cold water at the shower faucet . Plenty hot enough for the auto dishwasher too. Last year, i ran my electric water heater about 8 times total under heavily-cloudy skies ... otherwise , I get all the hot water i need from free solar energy. Its not a draindown system and i dont use anti-freeze liquid in it -- havent had any incidents even with the overnight temperature reaching 22 f a couple times.

Just a headsup in case youre considering it. My chief aim was to make it as simple and low cost as possible and to meet my hot water needs as a single occupant .

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Old 11-25-2012, 03:19 PM   #2
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Simple Solar Hot Water Box (for domestic hot water)


That's great! Its always nice to get your money back

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Old 11-25-2012, 03:33 PM   #3
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Simple Solar Hot Water Box (for domestic hot water)


I built a swimming pool heater some years back using an old sliding patio door section--and 3 rolls of black garden hose--tie strapped to a shallow wood box----

It got so hot I had to add tempering valves to keep the pool from overheating.

Thanks for the how-to----yours sure does look simple to construct---
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Old 11-26-2012, 09:33 AM   #4
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Simple Solar Hot Water Box (for domestic hot water)


Quote:
Originally Posted by oh'mike View Post
I built a swimming pool heater some years back using an old sliding patio door section--and 3 rolls of black garden hose--tie strapped to a shallow wood box----

It got so hot I had to add tempering valves to keep the pool from overheating.

Thanks for the how-to----yours sure does look simple to construct---
Yes, theres YouTube videos on guys that have done what you did to heat your swimming pool. Very low cost approach.

One might think that my 6 gallon capacity Solar Water Heating Box wouldnt be enough capacity for a 10 min. shower...but when you have to temper it down alot with cold water, the hot water flow is very small -- especially in the summer when that water is pushing 160 f .

I wanted to build a very low cost and simple System that didnt use a pump or elaborate costly collector .

Just for grins, i thought about fabricating some reflectors to intensify the solar light on the Pex Tubing just to see how hot i could get the water . This is commonly done for a Solar Oven application for cooking food.
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Old 11-26-2012, 09:41 AM   #5
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Simple Solar Hot Water Box (for domestic hot water)


Has there ever been a better reason to add a location to a profile?
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Old 11-26-2012, 10:30 AM   #6
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Originally Posted by cleveman View Post
Has there ever been a better reason to add a location to a profile?
Im located in Northern Florida .... very close to Tallahassee, Fl.

Regards, David Norman.

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